Abstract
Abstract Leymus chinensis is a dominant and most promising grass species in the Songnen Grassland of Northern China. Experiments were conducted to determine the effect of temperature, salinity, alkalinity and their interactions on seed germination. Seeds were germinated at four alternating temperatures (10–20, 15–25, 20–30 and 25–35°C), with saline stress (9:1 molar ratio of NaCl:Na 2 SO 4 ) and alkaline stress (9:1 molar ratio of Na 2 CO 3 :NaHCO 3 ). Germination percentage and rate were inhibited by either an increase or decrease in temperature from the optimal temperature range of 20–30°C, and were also inhibited by an increase in salinity and alkalinity at all temperatures. The inhibitory effects of high salinity on germination were greater at 25–35°C, but seeds were subjected to more stress even though the alkalinity was low under this temperature. Recovery percentage was highest at 400 m m salinity at 20–30°C, but only at 100 m m alkalinity, and 25–35°C also resulted in lower recovery percentage under both stresses. Results suggest that saline stress and alkaline stress have different impacts on seed germination and that saline‐alkaline tolerance of L. chinensis seeds is affected by the interactions of temperature and salinity‐alkalinity. Early July sowing in the field is recommended when temperature is optimal and salinity‐alkalinity concentrations are reduced by the high rainfall.
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Claims 10
Claim · model-written summary
Leymus chinensis germination percentage and rate declined above or below the optimal 20–30°C range.
Verbatim
t0“Leymus chinensis”
e0“Germination percentage and rate were inhibited by either an increase or decrease in temperature from the optimal temperature range of 20–30°C”
Claim · model-written summary
Increasing salinity inhibited Leymus chinensis germination percentage and rate at all temperatures.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- increase in salinitye0
- Outcome
- Germination percentage and ratee0
- Direction
- inhibitede0
- Qualifier
- at all temperaturese0
Not reportedComparator
Verbatim
t0“Leymus chinensis”
e0“Germination percentage and rate were inhibited by either an increase or decrease in temperature from the optimal temperature range of 20–30°C, and were also inhibited by an increase in salinity and alkalinity at all temperatures”
Claim · model-written summary
Increasing alkalinity inhibited Leymus chinensis germination percentage and rate at all temperatures.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- increase in salinity and alkalinitye0
- Outcome
- Germination percentage and ratee0
- Direction
- inhibitede0
- Qualifier
- at all temperaturese0
Not reportedComparator
Verbatim
t0“Leymus chinensis”
e0“Germination percentage and rate were inhibited by either an increase or decrease in temperature from the optimal temperature range of 20–30°C, and were also inhibited by an increase in salinity and alkalinity at all temperatures”
Claim · model-written summary
High salinity had a greater inhibitory effect on Leymus chinensis germination at 25–35°C.
Verbatim
t0“Leymus chinensis”
e0“The inhibitory effects of high salinity on germination were greater at 25–35°C”
Claim · model-written summary
Leymus chinensis seeds experienced more stress at 25–35°C despite low alkalinity.
- Taxon
- Leymus chinensisLeymus chinensist0
- Outcome
- more stresse0
- Direction
- moree0
- Qualifier
- alkalinity was lowe0
Verbatim
t0“Leymus chinensis”
e0“seeds were subjected to more stress even though the alkalinity was low under this temperature”
Claim · model-written summary
Leymus chinensis recovery percentage was highest at 400 m m salinity and 20–30°C.
Verbatim
t0“Leymus chinensis”
e0“Recovery percentage was highest at 400 m m salinity at 20–30°C”
Claim · model-written summary
Leymus chinensis recovery percentage was highest at 100 m m alkalinity.
Verbatim
t0“Leymus chinensis”
e0“Recovery percentage was highest at 400 m m salinity at 20–30°C, but only at 100 m m alkalinity”
Claim · model-written summary
At 25–35°C, Leymus chinensis recovery percentage was lower under both saline and alkaline stress.
Verbatim
t0“Leymus chinensis”
e0“25–35°C also resulted in lower recovery percentage under both stresses”
Claim · model-written summary
Saline and alkaline stresses had different effects on Leymus chinensis seed germination, interacting with temperature.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- saline stress and alkaline stresse0
- Outcome
- seed germinatione0
- Qualifier
- interactions of temperature and salinity‐alkalinitye0
Not reportedDirection
Verbatim
t0“Leymus chinensis”
e0“Results suggest that saline stress and alkaline stress have different impacts on seed germination and that saline‐alkaline tolerance of L. chinensis seeds is affected by the interactions of temperature and salinity‐alkalinity”
Claim · model-written summary
The authors recommend sowing Leymus chinensis in the field in early July when temperature is optimal and rainfall reduces salinity and alkalinity.
- Taxon
- Leymus chinensisLeymus chinensist0
- Outcome
- Early July sowing in the fielde0
- Qualifier
- when temperature is optimal and salinity‐alkalinity concentrations are reduced by the high rainfalle0
Verbatim
t0“Leymus chinensis”
e0“Early July sowing in the field is recommended when temperature is optimal and salinity‐alkalinity concentrations are reduced by the high rainfall”
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See all 9 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.